不同钢包吹氩工艺对夹杂物去除效果的比较

通过对新钢改进钢包吹氩工艺后的钢样电解分析发现,改进后的钢包吹氩工艺对大型夹杂物平均去除率达到了34.3%,特别是对于直径大于300μm的大型夹杂物去除率达到100%.利用扫描电镜对所取金相试样进行了夹杂物分析,确定了钢液中夹杂物的类型主要有:硅酸盐和硫化锰.利用金相显微镜对金相样中的显微夹杂物进行统计分析发现,改进吹氩方案下各个粒径范围的显微夹杂物都有一定减少,由此表明改进吹氩方案对显微夹杂物的去除有显著效果.吹氩的合理与否将直接决定钢液中的大型夹杂物和显微夹杂物的去除率.

Study on inclusion removal of ladle argon blowing process

Based on the improved ladle argon blowing in Xinyu Steel Plant, the average removal rate of macro-inclusions in steel can be reached 34.3% with electrolyzing analysis; especially, the macro-inclusions with a diameter above 300 μm can be completely wiped off. The types of inclusions are mainly silicate and sulfide in the samples determined by SEM analysis. Microscope statistics analysis shows that the amount of mi-cro-inclusions in each diameter range has been decreased. The analyzing result also shows that the inclusion re-moval rate in the improved ladle argon blowing process is obviously increased. The argon blowing process di-rectly determines the removal rate of macro-inclusions and micro-inclusions.